Die Casting (English: Die casting) is a metal casting process characterized by the use of a mold cavity to exert high pressure on melted metal. Molds are usually made from higher-strength alloys, and this process is similar to injection molding. Most die castings are iron-free, such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys, as well as their alloys. According to the different types of die-casting, the need to use cold chamber die-casting machine or hot chamber die-casting machine.
Casting equipment and molds are expensive, so the die-casting process is generally used in bulk manufacturing a large number of products. It is relatively easy to make die-casting parts, which typically require only four main steps, with low individual cost increments. Die casting is especially suitable for producing large quantities of small and medium-sized castings, so die casting is one of the most widely used in various casting processes. Compared with other foundry technologies, the die-casting surface is more flat and has a higher dimensional consistency.
On the basis of the traditional die-casting process, several improved techniques were introduced, including the process of reducing the hole of casting defects. Mainly used for processing zinc, can reduce the waste to increase the yield of direct injection process. There is also a new type of die-casting technology, which is invented by General Power company, as well as semi-solid die-casting and so on.